Keystones — Lintel
Five GCSE retrieval questions · 23 September 2012 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 2,000,000 in standard form
Answer: 2 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² - 20x + 100
Answer: (x - 10)(x - 10) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 10.61cm -
4. Ratio Mixed ratio problems
Simplify the ratio 1 hour : 5 minutes
Answer: 12:1 -
5. Statistics Mean
Calculate the mean of: 25, 33, 46, 11, 47, 18, 39. Give your answer to 2 decimal places
Answer: 31.29